691486230 has 64 divisors (see below), whose sum is σ = 1716380928. Its totient is φ = 178189440.

The previous prime is 691486193. The next prime is 691486241. The reversal of 691486230 is 32684196.

It is a super-2 number, since 2×691486230² = 956306412559225800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103285 + ... + 109775.

It is an arithmetic number, because the mean of its divisors is an integer number (26818452).

Almost surely, 2^691486230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 691486230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (858190464).

691486230 is an abundant number, since it is smaller than the sum of its proper divisors (1024894698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691486230 is a wasteful number, since it uses less digits than its factorization.

691486230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6621.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 691486230 is about 26296.1257602712. The cubic root of 691486230 is about 884.2895891660.

The spelling of 691486230 in words is "six hundred ninety-one million, four hundred eighty-six thousand, two hundred thirty".